Removable boiler and soot blower tube



Nov. 24, 1931. c. s. TURNER REMOVABLE BOILER AND SOOT BLOWER TUBE Filed April 24, 1930 INVENTOR jmaw Q! P I ATTORNEYS Patented Nov. 24, 1931 CHARLES S. TURNER, F DETROIT, LIICEIGAN REMOVABLE BOILER AND SOO'I' BLQW'ER TUBE Application filed A ril 24, 1930. Serial No. 446,998.

This invention relates to a combined boiler and steam blower tube construction adapted for individual installation between the headers of a tubular furnace unit, and has for its 6% object an improved organization of parts by means of which there may be individually installed or removed from such aligned apertures in the spacedly disposed headers as may be selected a combined tube and blower unit without the necessity of making special terminal arrangements for the connection of the ends of the tube unit with the headers and without the necessity of enlarging or otherwise pr'eparing holes for the reception of the tube ends. Since by no means all of the tube units extending between headers need be, or indeed are desired to be of the supplemental blower type herein dealt with, these being only positioned at selected points among the group of tubes as a whole, the advantage of my improved construction in facilitating the installation and substitution of these tubes when necessary constitutes a distinct feature of advantage over any now known practice of which I am aware.

In the drawings: Figure 1 is an elevational View of one of my combined boiler and blower tube units terminally positioned in fragmentarialy indicated portions of headers.

Figure 2 is a sectional elevational view on a much larger scale of one end of my improved tube as anchored in the header wall and of the adjacent intermediate portion wherein the blower unit is present.

Figure 3 is a cross-sectional elevational view taken along the line 33 of Figure 2, and looking in the direction of the arrows there shown.

Figure 4: is a partly sectional elevational view of a number of boiler tube units, some plain and some of the type herein contemplated, shown in installed relation to the header wall, the view being taken looking in the same direction as that indicated regarding Figure 3.

Figure 5 is a sectional elevational view, similar to Figure 3, of a slightly modified form of my invention.

Figure 6 is across sectional view of the modification shown in Figure 5 taken along the line 66 of the latter and looking in the direction of the arrows there shown.

Figures 7 and 8 are cross sectional views similar to Figures 3 and 6 of slightly modi fled contourings of the boiler tube and steam blower sections of my im roved unit.

A and B represent hea ers suitably positioned within a furnace space, between axially aligned apertures in the walls of which, so as A and B, extends one of the removable and combined boiler tube and steam blower units C, which forms the subject of my invention, being insertable and withdrawable through a hand hole aperture, as I, in the ope5 posite wall of one or the other of the headers. As brought out in either of Figures 2 or 5, the large-diametered end of the tube unit, after passing through the header wall, is flared or deformed, .as at D, so as to hold the otherwise removable unit in firmly assembled relation to the header wall, this being one of several well-known expedients resorted to for this purpose, whether the intermediate portions of the tube embodies the novel features constituting my invention, or whether the tube be of the plain type shown at E in Figure 4. Since only certain units or groups of the numerous tubes extending between the header need be of the combined boiler tube 30 and blower characteristics herein contemplated, it is desirable that in preparing the headers for the installation of such construction, by the boring of aligned holes in their walls the diametrical size of these holes be 35 kept uniform, and since in some construc tions it may be desirable to have the blower tube units arranged in the aligned form in alternate rows, as shown at F in Fi re 4, while other rows are of the plain type and other dispositions and apportionments as between the plain tubes and blower tubes being often desirable, it is in the interests of economy of manufacture and efficient construction and maintenance that all of the holes in the respective header walls be of the same size. If, however, those tubes whereof the steam blower portions are integrated structural parts were of the same diameter throughout their length as regards the boiler m0 tube chamber alone, the resultantly greater diameter of at least the intermediate portion of the combined boiler tube and steam blower units would be greater than that of the apertures, as A and B in the header walls, so that they could not be moved into their intended positions therethrough.

To obviate this, I construct my improved and combined boiler tube and steam blower units in either of the forms shown in Figures 2 and 5, in the former of which I slightly diminish the effective cross-sectional diameter of the intermediate portion of the tube as regards its strictl boiler tube function, and in a portion 0 the more or less crescentshaped space R thus left, as regards the diameter of the terminal portion of the tube (l, l structurally integrate with the walls of the intermediate portion a supplemental chamber, as G, whose more or less cross sectionally semi-circular wall H is integrated with the adjacent portions of the circular tube wall so as to form an appendage thereto which, for the length of its extent along the tube G as a whole,'forms a separate steam chamber, into which steam for blower purposes is conducted through the inlet J. In the form of construction shown in Figure 2 after the unit as thus far constituted and described has been placed in position relatively to the headers,

\ I attach, by screwing in or otherwise into suitably spaced apertures in the wall H, the desired number of steam jet elements, as K, which of course can notbe installed until after the tube is placed in position, since at neighboring tubes. In case the withdrawal of a tube thus equipped becomes necessary, it can be easily eflected after first removing the v projecting zzle units K, and then reducing the flanged or deformed holding ends D of the tubes adjacent the header walls, preparatory to the lengthwise withdrawal of the tube in question.

In the modified form of construction shown in Figures 5 and 6 the same principle is followed as regards the reduction of the eifective diameter of the intermediate portion of the tube C still urther than in the form shown in Figure 2550 that the wall M of the supplemental chamber N still lies within the line of the enlarged end portions of the tube to such a degree that the blower nozzle K, which may otherwise be of the same form as shown at K in Figure 2, or of any equivalent form.

in either case, even when installed in place in the wall M does not project therebeyond. The chamber N is served for blower purposes by the supply inlet J in the same manner as is shown at J in Figure 2, but in this form of construction the entire combined boiler tube and blower unit may be withdrawn through either of the apertures A. and B without displacement of the nozzle K.

It will be obvious that other cross sectional forms for the intermediate orboile'r tube portion of my improved tube unit C may be resorted to from the truly circular form shown in Figures 3 and 6, as for example, whatmight be described as the flattened form shown at P in Figure 7, and the squared cross-sectional contouring of such a modified form illustrated by the corresponding parts P and Qin Figure 8 wherein there is left no such crescent-shaped space after themtegration therewith of the accordingly flat-v tened blower chamber Q or Q, as is indicated for the sake of comparison at R in Figures 3 and 6, the underlying principle as to all of these forms being the avoidance of an ex- .cess of diametrical measurement in any direction of the intermediate portion of the tube as a whole, as contrasted with the header wall apertures A and B, so that as to these latter no provision or special sizing of any particular holes in the walls of the header need be indulged in, as between those wherein plain tubes are intended to be installed and those wherein any of the forms of my improved and combined boiler tube and blower tube units are to be placed.

What I claim is:

1. In combination with header walls provided with apertures of selected size for the selective insertion and removal of individual tube elements, a structurally unitary tube element installed therein and extending through the apertures, said tube element having terminal portions of plain contour and of such external diameter that they accurately lodge in the header wall apertures, and an intermediate portion consisting of separate though structurally integrated boiler tube and blower sections, the total greatest diametrical size of whichis no greater than that of'the plainly contoured end portions.

2. In combination with header walls having axially aligned apertures adapted for the passage through and lodgment there1n of the plain end portions of a fluid-conducting element, a combined fluid-conducting tube comprising both a blower and a fluid-conducting section, such section of the intermediate portion havin a combined diameter no greater than that 0 the plain end portions, whereby the passage of the unit through an aperture through which the end portions will pass may be effected.

4. A removable combined blowerand boiler tube unit for a. boiler tube furnace incorporating a header and an aperture in the wall thereof the end portions of such unit being plain and generally cylindrical and one engaging in said aperture, the intermediate ortlon of each unit consisting of a boiler tn 0 chamber and a blower chamber whose walls are structurally inte rated one with another and the greatest com ined diametrical extent of which is not in excess of the uniform diameter of the end portions, whereby the entire unit may be inserted or withdrawn from its terminal lodgment in the header wall without impairment or enlargement of said tube-supporting aperture therethrou h.

5. combined fluid-conductive and blower chamber unit adapted for installation of its terminal portions in apertures in the walls of headers, com rising an intermediate portion having a re uced boiler tube portion and a blower chamber and end portions whose cross-sectional size and contour permits passage of the intermediate portion through an aperture through which the ends will ass.

In testimony whereof I sign this specification.

CHARLES S. TURNER. 

